I need a mouth wash with some fluoride in it, which mouth wash works the best?

ADA Seal: If you are going to purchase a Fluoride mouthwash/product without a prescription, purchase one with the ada seal. By doing that you will know the product is effective.

OTC vs Rx: Otc Fluoride rinses have low levels of Fluoride and depending on the situation may not be strong enough. They do vary in strength. Your dentist can write a prescrition for different types of Fluoride rinses or paste depending upon your needs and situation.

Choices...: There are mouth rinse products available in many colors and flavors. Some actually help with your oral health (some do not make a significant difference). Use what your dentist advises: if your dentist recommended Fluoride rinse, act is probably the most popular, but pick your favorite based on the packaging and flavor (it's more important you like it enough to use it).

Phosflur: The best otc Fluoride rinse is phosflur. It used to be prescription strength.

The cheapest: A generic or other wash with Fluoride in the same concentration will work well, it is the % of sodium Fluoride that makes this so. There are no substitutions for complete oral hygiene skills. If you remove all of the palque, Fluoride whether propietary or generic is not a necessity.